I see some code examples like this:
<DIV onmouseover="th is.style.backgr ound='blue'">
and other code examples like this:
<DIV onmouseover="ja vascript:this.s tyle.background ='blue'">
Which way is more proper? Or are both ways perfectly fine? Are there any
specifications that discuss when "javascript :" should be put in front of code?
Jul 20 '05
25  3737 
Waaaaay back on 06-Dec-03 03:58:11, delerious said this about Putting "javascript :" in front of code?: I see some code examples like this:
<DIV onmouseover="th is.style.backgr ound='blue'">
and other code examples like this:
<DIV onmouseover="ja vascript:this.s tyle.background ='blue'">
Which way is more proper? Or are both ways perfectly fine? Are there any
specificatio ns that discuss when "javascript :" should be put in front of
code?
The "javascript :" prefix, seriously, is a gift from Satan. It's horrible.
Most browsers I've used don't know what the fleeick to do with that.
If it works without the "javascript :" prefix, I say don't use it. If it
works WITH it, find an alternate way.
-- da****@banana-and-louie.org * dauber.50megs.c om
* ICQ: 28677921 * YIM: dau_ber * AIM: ddaauubbeerr
On Sat, 06 Dec 2003 15:00:01 +0100, Lasse Reichstein Nielsen <lr*@hotpop.com >
wrote: Which way is more proper?
The former. Personally, I would write:
<div onmouseover="th is.style.backgr oundColor='blue ';">
but that's leaving correct and passing on to pedantic :)
Oh this was another thing I was wondering about. :) I tried to do
"this.style.bac kground-color='blue'" but got an error. So in order to get
those CSS properties to work in Javascript, I should remove the hyphens and
capitalize the first letter of the words after hyphens?
Thanks for the great, informative responses everyone! de*******@no.sp am.com writes: Oh this was another thing I was wondering about. :) I tried to do
"this.style.bac kground-color='blue'" but got an error. So in order to get
those CSS properties to work in Javascript, I should remove the hyphens and
capitalize the first letter of the words after hyphens?
Yes, that is the way CSS properties are mapped into Style Object
properties in the W3C DOM (and supported in most modern browsers).
<URL:http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSS2Properties>
/L
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Jim Ley wrote on 06 Dec 2003: On Sat, 06 Dec 2003 12:10:04 GMT, Michael Winter
<M.******@bluey onder.co.invali d> wrote:
For JavaScript, the MIME type is text/javascript, so the above
should read:
Could you cite the relevant RFC which indicates this please?
for JavaScript (capatilised like that) the relevant one would be
application/x-javascript surely?
The HTML specification itself uses text/javascript as the MIME type
for JavaScript (though that doesn't necessarily make it correct).
This issue was raised in W3C's public HTML mailing list two years ago
( http://lists.w3.org/Archives/Public/...Sep/0020.html). It
comments that then, various script MIME types (of both text and
application types) were not registered. Looking on IANA's website, I
found that they're /still/ not registered. Mentioned in that mailing
list was the fact that browsers are split on what types to use: IE
with text and Netscape with application. However, as neither types
have been registered, neither browser is correct. I don't know what
various browsers consider the proper JavaScript MIME type. However, I
do agree that an application type is the better choice. If you omit either the header or META element, but use intrinsic
events, your HTML document is invalid.
No, invalid has a technical meaning in HTML, and that does not
make it invalid, it may make it a non-conforming HTML 4
document, but then that's only a tiny subset of HTML. ( RFC
2854 blesses all tag-soup to be html)
Do the semantics really matter? Yes, if you attempted to validate the
document it would succeed, but the document is still incorrect and
relies on behaviour that is not guaranteed.
Mike
--
Michael Winter M.******@blueyo nder.co.invalid (replace ".invalid" with ".uk")
Lee wrote on 06 Dec 2003: Michael Winter said:
Richard Cornford wrote on 06 Dec 2003:
"Michael Winter" <M.******@bluey onder.co.invali d> wrote in
message
news:Xn******** *************** ********@193.38 .113.46...
<snip>
The second way is incorrect.
Incorrect might be a bit strong as it implies something
contrary to some criteria of validity or syntactic
correctness. Though that may just be a matter of
interpretation (of English).
Incorrect, meaning: the wrong way of specifying the language of
an intrinsic event.
The OP didn't ask how to specify the language, he asked
which syntax was more proper.
I know what the OP asked. That's true, but the topic isn't (quite) relating to JavaScript
source code. This is regarding the use of the string,
"javascript:" , to actually perform some specific action.
That's not how I interpret the topic. I suspect the OP
didn't know that other languages were even available.
The original question was: Is "javascript :som e_javascript_co de"
syntactically correct? The answer is yes. But leaving it at that
neglects the assumption upon which the inclusion of "javascript :" is
based. Some authors that post to this group attach a special meaning
to that string in an intrinsic event, and that association needs to
be dispelled.
Mike
--
Michael Winter M.******@blueyo nder.co.invalid (replace ".invalid" with ".uk")
Michael Winter said: The original question was: Is "javascript:som e_javascript_co de"
syntacticall y correct? The answer is yes. But leaving it at that
neglects the assumption upon which the inclusion of "javascript :" is
based. Some authors that post to this group attach a special meaning
to that string in an intrinsic event, and that association needs to
be dispelled.
Certainly, but not by replacing it with the false belief that
it is incorrect JavaScript. The message that you responded
to had made the actual facts clear. You muddied the waters
by suggesting that his explanation was wrong.
On Sun, 07 Dec 2003 02:11:17 GMT, Michael Winter
<M.******@bluey onder.co.invali d> wrote: Jim Ley wrote on 06 Dec 2003:
The HTML specification itself uses text/javascript as the MIME type
for JavaScript (though that doesn't necessarily make it correct).
Good for it, it has no change control or anything else over
javascript, The HTML WG has no more status than me or you on what is
the mime-type for js, you'll note the SVG WG say it's text/ecmascript.
However, as neither types
have been registered, neither browser is correct.
You don't seem to understand the x- tree, whilst you shouldn't use an
x-tree in public really, there we'ren't vnd. trees for it to go, there
is nothing wrong in using an x-tree.
I don't know what
various browsers consider the proper JavaScript MIME type. However, I
do agree that an application type is the better choice.
No it's not, it's a private namespace for development/experimental
purposes and should only be used by agreement of what it means at
boths ends, that's never happened. x-trees should not be used on the
web, and they should not be used at all now (the vnd. and prs. trees
are better for what it achieves) If you omit either the header or META element, but use intrinsic
events, your HTML document is invalid.
No, invalid has a technical meaning in HTML, and that does not
make it invalid, it may make it a non-conforming HTML 4
document, but then that's only a tiny subset of HTML. ( RFC
2854 blesses all tag-soup to be html)
Do the semantics really matter?
Yes, the meaning of VALID matters, the more important fact though is
it is only HTML 4 where the above rules come into play, as most people
author tag-soup, or other HTML types, the rules do not exist.
Jim.
--
comp.lang.javas cript FAQ - http://jibbering.com/faq/
Jim Ley wrote on 07 Dec 2003: On Sun, 07 Dec 2003 02:11:17 GMT, Michael Winter
<M.******@bluey onder.co.invali d> wrote:
Jim Ley wrote on 06 Dec 2003:
The HTML specification itself uses text/javascript as the MIME
type for JavaScript (though that doesn't necessarily make it
correct).
Good for it, it has no change control or anything else over
javascript, The HTML WG has no more status than me or you on
what is the mime-type for js, you'll note the SVG WG say it's
text/ecmascript.
That's why I said: "though that doesn't necessarily make it correct".
I realise that they have no say over the MIME type for JS. However, I
would of thought that they made the decision to use that type in
their specifications for a good reason.
<snip>
I don't know what
various browsers consider the proper JavaScript MIME type.
However, I do agree that an application type is the better
choice.
No it's not, it's a private namespace for
development/experimental purposes and should only be used by
agreement of what it means at boths ends, that's never happened.
x-trees should not be used on the web, and they should not be
used at all now (the vnd. and prs. trees are better for what it
achieves)
Where in that paragraph (specifically that last sentence) do I
mention application/x-javascript?
Yes, the meaning of VALID matters, the more important fact
though is it is only HTML 4 where the above rules come into
play, as most people author tag-soup, or other HTML types, the
rules do not exist.
As you say, most people write tag soup. It stands to reason that most
wouldn't understand (or care about) the distinction between invalid
and incorrect. I used 'invalid' as a synonym of wrong. It didn't
occur to me at the time that it could be interpreted any other way.
It is for that reason that I refer (and anticipate references) to
validation of a HTML document explictly.
Mike
--
Michael Winter M.******@blueyo nder.co.invalid (replace ".invalid" with ".uk")
On Sun, 07 Dec 2003 13:31:41 GMT, Michael Winter
<M.******@bluey onder.co.invali d> wrote: That's why I said: "though that doesn't necessarily make it correct".
I realise that they have no say over the MIME type for JS. However, I
would of thought that they made the decision to use that type in
their specifications for a good reason.
Such as? - If the reason is "it's what works in current UA's" then
others are free to argue that the defaulting to ecmascript for
intrinsic events is just as legitimate.
Where in that paragraph (specifically that last sentence) do I
mention application/x-javascript?
sorry, I misread an "an" for a "the" there, and thought you were
talking about the x-javascript one.
Jim.
--
comp.lang.javas cript FAQ - http://jibbering.com/faq/
Jim Ley wrote: Michael Winter wrote: The HTML specification itself uses text/javascript as the MIME type
for JavaScript (though that doesn't necessarily make it correct).
Good for it, it has no change control or anything else over
javascript,
It is used in the Recommendation because it is widely supported.
The HTML WG has no more status than me or you on what is the mime-type
for js, you'll note the SVG WG say it's text/ecmascript.
You know that text/ecmascript targets a different language. Besides,
that is not standardized as well. Since the W3C does not watch over
either ECMAScript or JavaScript, as you wrote before (but ECMA does),
one of W3C's working groups is not the appropriate standardization
board to decide what is the proper MIME type for JavaScript. And last
but not least, what about http://lists.w3.org/Archives/Public/...2Aug/0008.html
?
PointedEars
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